Once you have received the products, make sure that the package is intact and sealed and that all the contents inside show no damages.
Before proceeding with using it/them, remember to read and follow all the instructions provided.
For future usages, make sure that the product has previously been used according to the instructions provided and stored in a healthy environment, away from sources of heat.
To avoid compromising the filtering effectiveness of the products, do not tamper with, replace or damage any part of it.